MAX2016 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – LF-to-2.5GHz Dual Logarithmic Detector/ Controller for Power, Gain, and VSWR Measurements

19-3404; Rev 0; 9/04
EVAALVUAAILTAIOBNLEKIT
LF-to-2.5GHz Dual Logarithmic Detector/
Controller for Power, Gain, and VSWR Measurements
General Description
The MAX2016 dual logarithmic detector/controller is a
fully integrated system designed for measuring and
comparing power, gain/loss, and voltage standing-wave
ratio (VSWR) of two incoming RF signals. An internal
broadband impedance match on the two differential RF
input ports allows for the simultaneous monitoring of sig-
nals ranging from low frequency to 2.5GHz.
The MAX2016 uses a pair of logarithmic amplifiers to
detect and compare the power levels of two RF input
signals. The device internally subtracts one power level
from the other to provide a DC output voltage that is pro-
portional to the power difference (gain). The MAX2016
can also measure the return loss/VSWR of an RF signal
by monitoring the incident and reflected power levels
associated with any given load. A window detector is
easily implemented by using the on-chip comparators,
OR gate, and 2V reference. This combination of circuitry
provides an automatic indication of when the measured
gain is outside a programmable range. Alarm monitoring
can thus be implemented for detecting high-VSWR
states (such as open or shorted loads).
The MAX2016 operates from a single +2.7V to +5.25V*
power supply and is specified over the extended -40°C
to +85°C temperature range. The MAX2016 is available
in a space-saving, 5mm x 5mm, 28-pin thin QFN.
Applications
Return Loss/VSWR Measurements
Dual-Channel RF Power Measurements
Dual-Channel Precision AGC/RF Power Control
Log Ratio Function for RF Signals
Remote System Monitoring and Diagnostics
Cellular Base Station, Microwave Link, Radar,
and other Military Applications
RF/IF Power Amplifier (PA) Linearization
Typical Application Circuit appears at end of data sheet.
Features
♦ Complete Gain and VSWR Detector/Controller
♦ Dual-Channel RF Power Detector/Controller
♦ Low-Frequency to 2.5GHz Frequency Range
♦ Exceptional Accuracy Over Temperature
♦ High 80dB Dynamic Range
♦ 2.7V to 5.25V Supply Voltage Range*
♦ Internal 2V Reference
♦ Scaling Stable Over Supply and Temperature
Variations
♦ Controller Mode with Error Output
♦ Available in 5mm x 5mm 28-Pin Thin QFN
Package
*See Power-Supply Connection section.
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX2016ETI
-40°C to +85°C
28 Thin QFN-EP*,
bulk
T2855-3
MAX2016ETI-T
-40°C to +85°C
28 Thin QFN-EP*, _T2855-3
T/R
MAX2016ETI+D
-40°C to +85°C
28 Thin QFN-EP*,
lead free, bulk
T2855-3
MAX2016ETI+TD
-40°C to +85°C
28 Thin QFN-EP*,
lead free, T/R
T2855-3
*EP = Exposed pad.
+ = Lead free.
D = Dry pack.
Pin Configuration
28 27 26 25 24 23 22
FA1 1
V_CC 2
RFINA+ 3
RFINA- 4
GND 5
COUTH 6
CSETH 7
MAX2016
21 FB1
20 V_CC
19 RFINB+
18 RFINB-
17 GND
16 COUTL
15 CSETL
8 9 10 11 12 13 14
THIN QFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.